Furnace appliance



Sept. 8, 1931. J. M. DUFFY 1,822,517

FURNACE APPLIANCE Filed Feb. 6, 1931 lili! Patented Sept. 8, 1931 UNITED STATES @EIS JOHN' I. DUFFY, 0F VENTNOB, 4IN'ETY JERSEY FUBNACE APPLIANGE .Application illed February 6, 1931.

The invention in general relates to coal burning furnaces having for its main object the provision of an improved combustion promoting and fuel saving device which e may be conveniently secured to conventional forms of coal-burning furnaces without change in the construction thereof.

Another object is to provide a highly eilicient coal saving device of comparatively 1@ simple design and construction that may be quickly attached to and detached from any ordinary type of coal-burning furnaces.

Other objects and advantages residing in the construction, combination and arrange- 15 ment of parts will appear hereinafter and will be best understood when taken in connection with the accompanying drawings, in which Figure 1 is an elevational view, partly in g@ section, with parts broken away, of a coalburning furnace in which an embodiment of my invention has been operatively attached.

Figure 2 is an enlarged vertical sectional view taken on line 2-2 of Figure l.

w Figure 3 is a transverse sectional view taken on line 3-3 of Figure 1;

Figure i is a transverse sectional view taken on line 4-4 of Figure 2, and

Figure 5 is a perspective view of one of w the elements employed for supporting my device in the irebox of a furnace.

In the drawings, wherein similar characters of reference indicate corresponding parts in the preferred form of the inven- 86 tion,

A designates a coal burning furnace of conventional type comprising" the usual fire box 11 in which is arranged the ygrate 12. A water jacket 13 of customary type form- 4@ ing a part of the furnace A is adapted to receive the heat from the fuel 14, in this instance coal. 'llie above described construction forms no part of my invention being typical of coal burning furnaces in genera 45 My combustion-promoting and fuel-savr` ybest shown in Figu Serial No. 513,839.

ing invention comprises a device B which includes a cylindrical member 15 formed of two semi-cylindrical sections 16--17. As re 4, the lateral edges of the Semi-cylindr1cal sections 162-17 have projections 18-19 which coact to form a comparatively secure interlocking engagement of the said sections 16-17 By further inspection of Figure 4, and as also shown in Figure 1, each of the semicylindrical sections 16-17 arel provided with laterally projecting lugs 20-21, these lugs being apertured to recelve the stems of bolts 22, the ends of each of which are engaged by a nut 23, Awhich serves with the bo ts 22 to clampingly en age the two semicylindrical sections l-lg together to form the completed cylindrical member 15.

As shown in Figures 1, 2 and 3, it will be seen that the. cylindrical member 15 is also provided with projecting lugs 24-25 which are secured to the annular wall of the cylindricalmember 15. Each f the laterally projecting lugs 24-25 are apertured to receive the. lower threaded ends 26 of bars 27, 28, the u per threaded ends 29 of which pass throng slots 30 formed in a coacting pair of elongated U-shaped members 31, 32, the vopen ends of which are supported on angle iron brackets 33 fastened to the inner wall of the furnace A, as best shown in .Figure 3. The U-shaped members 31, 32 are preferably secured together by a bolt 34, the

Vstem of which is passed throughthe registering slots 30 of the said U-shaped members, a nut 35 clamping same together, as shown in Figure 2.

As illustrated in Figures 2 and 3, the threaded upper ends 29 ofA the bars 27, 28

are secured in desired position to the U- shaped members 31, 32 by nuts 36, 37 be tweeneach pair of which a portion of the said U-sha ed members 31--32 is clamped. When the ower nuts 37 are loosened by unscrewing same, the bars 27,28 may-be slid in order to place the member in a predetermined position. It will also be observed that the member 15 may be raised and low.

ered in the rebox by turning nuts 38, 39 which engage the lugs 24, 25, on the lower threaded ends 26 of the bars 27, 28 respectively. y

The cylindrical member 15 is preferably formed with a plurality of holes 40,forined in both semi-cylindrical sections 16--17 towards the lower portion thereof, and it will be further noted that I have also placed a row of rforations 41 in each of said semicylindrical sections at the upper part thereof for a purpose which will now appear. Upon the top of the cylindrical member 15, a lid 42 havin an internal downwardly rojecting annu ar lip 43 is positioned the ip 43 engaging the inner periphery of the cylindrical member 15.

The fuel 14 it will be noticed when thrown in the rebox 11 through the openin 44' in the 'furnace A which is closed by the urnace door 45, will drop into the annular space in the' firebox 11 between the inner Wall 46 of the water jacket 13, and the exterior surface of the cylindrical member 15.

yThe cylindrical me ber-15 may be of such a height that the lid thereof which closes the said cylindrical member at the top, will fall slightl below the level'of the opening 44 of the urnace A in order notto interfere with the delivery of the coal to the lire box 11.

The functions and general manner of operation of my device may now be brieiy described as follows Assumin coal 14 to be burning in the fire box 11, as indicated in Figure 1, and that air is entering through the damper opening 47 at the base of the eater A, a certain part of the air will pass throu h the coal 14 in the customary manner, w ile another part' ofthe air will pass up through the unclosed lower end of the cylindrical member 15. Part of this latter air will pass outwardly through the perforations into the coal thereby promoting combustion of the coal, and still another portion will pass upwardly and outwardly through the perforations 41 at the top of the cylindrical member 15, where it will mingle. with unconsumed or insufliciently oxygenated gases arising from the burning coal, in this manner providin suflcient oxygen for the said unconsume gases to. permit of their combustion within the re box 11.

It is a well known fact that most coal burning furnaces of conventional design and construction permit a portion of unconsumed gases topass out through the chimney, whereas by the present method, this defect which is not only wasteful of fuel, is. revented.

t is further desired to point out that the central space occupied by the draft reinforcing cylindrical member 15 is that space in the furnace where the heat'from the burning fuel or coal is least available for application to the water jacket 13. It can be recognized at a glance that the burning coals immediately juxtaposed against the water jacket 13 are the ones in a large measure responsible for the heating of water within the Water jacket 13. A considerable portion of the heat arising from the burning coal in the center of the conventional furnace, particularly the larger types, passes out of the chimney, while in the present case by Y means of my invention this above mentioned comparatively dead or lost central space is occupied by a device which greatly assists in a more thorough combustion of the coal, while at the same time a much smaller quantity of fuel is required for yielding practically the same results as that hitherto obtained by a much more lavish expenditure of fuel.

As the member 15 may be shifted to the left or right in the firebox 11 by loosening nuts 37, or removed bodily therefrom by removing nuts 38, 39, it will now be seen that the device is adapted to be installed and adjusted quickly in practically all furnaces, and taken out in a few moments when desired.

I am aware that the invention may be enibodied in other specific forms without departing from the spirit or essential attributes thereof, and l therefore desire the present embodiment tobe considered in all respects as illustrative and not restrictive, reference being had to the appended claims rather than to the foregoing description to indicate the scope of the invention.

Having thus described my invention what I claim as new anddesire to secure by Letters Patent, is

1. A device of the kind described for a coal burning furnace comprising a member having` a plurality of draft-promoting holes formed therein, means for supporting said lnember within the firebox of a coactin furnace, said means including a air o bars fastened to and horizontally ad]ustable rela'- tively to U--shaped members secured within the interior of the furnace.

2. A furnace of the kind described having a fire box, combustion chamber, water jackets and a coacting member secured Within said firebox, said member being formed of two half sections each provided with a lug, bars securable and vertically adjustable relatively to said lugs and to U-shaped-members fastened to said furnace, said bars serving to support the member above the grate of the furnace in a plurality of redetermiiied different positions in the fire ox thereof,means formed at the upper and lower portion of said member for promoting combustion and oxygenating unconsumed gases, and slots in said U-shaped members receiving said bars whereby the bars may be slid horizontally for arranging the said member in'predetermined positions.

3. A device of the kind described for use in a furnace having a rebox, said device comprising a hollow apertured member, and a. vertically and horizontally adjustable supporting frame Work attached thereto, whereby said hollow member may be adjusted both vertically and horizontally.

' JOHN M. DUFFY. 

